Engineering
Asphalt is primarily known for use in roadways, but it's also used to pave playgrounds, bicycle paths, running tracks and tennis and basketball courts—all platforms for activities where breathing toxic fumes can be dangerous. ...
Sep 22, 2023
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Energy & Green Tech
In spring, not only snowdrops and crocuses sprout, but also construction sites on Swiss roads. Repair work, patching and renewal is everywhere. Some of the old asphalt from the Swiss road network is being recycled, but around ...
Sep 7, 2023
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Hi Tech & Innovation
Slipping and sliding on snowy or icy roads is dangerous. Salt and sand help melt ice or provide traction, but excessive use is bad for the environment. And sometimes, a surprise storm can blow through before these materials ...
Feb 16, 2023
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47
Energy & Green Tech
The future seems bleak for Canada's oilsands. But given the world's ongoing need for smooth, safe roads, there is hope for the industry. Asphalt binder made from oilsands bitumen is the ideal glue to hold the world's 40 million ...
Jul 25, 2022
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38
Engineering
Scientists from the University of Granada have used magnetic materials in "smart" asphalts that modify their properties in the presence of external magnetic fields. This work—part of the wider research field of "smart cities"—would ...
Nov 7, 2019
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Asphalt /ˈæsfɔːlt/ ( listen) or /ˈæsʃfɛlt/, also known as bitumen, is a sticky, black and highly viscous liquid or semi-solid that is present in most crude petroleums and in some natural deposits, it is a substance classed as a pitch. Until the 20th century, the term asphaltum was also used.
The primary use of asphalt is in road construction, where it is used as the glue or binder mixed with aggregate particles to create asphalt concrete. Its other main uses are for bituminous waterproofing products, including production of roofing felt and for sealing flat roofs.
The terms asphalt and bitumen are often used interchangeably to mean both natural and manufactured forms of the substance. In American English, asphalt (or asphalt cement) is the carefully refined residue from the distillation process of selected crude oils. Outside the United States, the product is often called bitumen. Natural deposits terminology also sometimes uses the word bitumen, such as at the La Brea Tar Pits.
Naturally occurring asphalt is sometimes specified by the term "crude Bitumen"; its viscosity is similar to that of cold molasses. whilst the material obtained from the fractional distillation of crude oil (boiling at 525 °C (977 °F)) is sometimes referred to as "refined bitumen".
This text uses material from Wikipedia, licensed under CC BY-SA
